Caddy

Caddy For Windows
Download the newest release from here.
Create a folder named Caddy on root of the C:\ drive or where you got Windows installed.
Extract the Caddy zip in the folder you just created.
In the new Caddy folder make another folder called logs.
Make a Caddy File
Create a new text file, rename it to Caddyfile and make sure it doesn't have an extension.
In the Caddyfile paste:
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example.ddns.net {
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    encode gzip
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        log {
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            output file C:\Caddy\logs\petio.log {
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            roll true               # Rotate logs, enabled by default
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            roll_size_mb 5          # Set max size 5 MB
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            roll_gzip true          # Whether to compress rolled files
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            roll_local_time true    # Use localhost time
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            roll_keep 2             # Keep at most 2 log files
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            roll_keep_days 7        # Keep log files for 7 days
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            }
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        }
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    reverse_proxy localhost:7777
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}
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Remember to change localhost and port accordingly.
Start Caddy
You will need the bat file for both manuall and service.
You have two ways to run Caddy.
You can do it manually by creating a bat file:
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cd C:\Caddy
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Caddy run'
Copied!
You can run it as a service. Just follow the NSSM or Shawl guides.
Port Forwarding
Open port 80 and 443. 
If you don't know how to port forward you should check out Portforward.com and find your router.
Firewall
Open port 80 and 443 in your firewall.
To open Windows Firewall, go to the Start menu, select Run, type WF.msc and then select OK.
Now click on Inbound Rules, then on the right side you want to click new rule.
Select Port click next.
Select TCP and type inn 80, 443 then next.
Allow the connection and hit Next. Then just choose a name like "Caddy".
DNS
Now you need to get DNS redirect set up. 
Some examples of services you can use are noip or DuckDNS. Just make sure you set the record type as “DNS Host (A)”.
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